"Fino" trailer series 1972-2002(?). Since 1988 with two numerals - two letters in the middle row.
O = Semi-trailer (oplegger). XX = Weight over 31951 kg.

Private vehicles of Dutch Forces in Germany. This series in use since 1975.
MB (1980-2001) = Personnel resident in the Netherlands (Met Belasting).
N = Netherlands Forces in Germany. Three numerals until 1998.